﻿using System.Text;

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace Lucene.Net.Analysis.Compound.Hyphenation
{

	/// <summary>
	/// This class represents a hyphen. A 'full' hyphen is made of 3 parts: the
	/// pre-break text, post-break text and no-break. If no line-break is generated
	/// at this position, the no-break text is used, otherwise, pre-break and
	/// post-break are used. Typically, pre-break is equal to the hyphen character
	/// and the others are empty. However, this general scheme allows support for
	/// cases in some languages where words change spelling if they're split across
	/// lines, like german's 'backen' which hyphenates 'bak-ken'. BTW, this comes
	/// from TeX.
	/// 
	/// This class has been taken from the Apache FOP project (http://xmlgraphics.apache.org/fop/). They have been slightly modified. 
	/// </summary>

	public class Hyphen
	{
	  public string preBreak;

	  public string noBreak;

	  public string postBreak;

	  internal Hyphen(string pre, string no, string post)
	  {
		preBreak = pre;
		noBreak = no;
		postBreak = post;
	  }

	  internal Hyphen(string pre)
	  {
		preBreak = pre;
		noBreak = null;
		postBreak = null;
	  }

	  public override string ToString()
	  {
		if (noBreak == null && postBreak == null && preBreak != null && preBreak.Equals("-"))
		{
		  return "-";
		}
		StringBuilder res = new StringBuilder("{");
		res.Append(preBreak);
		res.Append("}{");
		res.Append(postBreak);
		res.Append("}{");
		res.Append(noBreak);
		res.Append('}');
		return res.ToString();
	  }

	}

}